EP0136708A2 - Verfahren zur Herstellung eines Bündels von optischen Fasern - Google Patents

Verfahren zur Herstellung eines Bündels von optischen Fasern Download PDF

Info

Publication number
EP0136708A2
EP0136708A2 EP84111827A EP84111827A EP0136708A2 EP 0136708 A2 EP0136708 A2 EP 0136708A2 EP 84111827 A EP84111827 A EP 84111827A EP 84111827 A EP84111827 A EP 84111827A EP 0136708 A2 EP0136708 A2 EP 0136708A2
Authority
EP
European Patent Office
Prior art keywords
image fiber
image
fiber preform
optical fiber
hydrogenated
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP84111827A
Other languages
English (en)
French (fr)
Other versions
EP0136708A3 (en
EP0136708B1 (de
Inventor
Yoshiki C/O Yokohama Works Chigusa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sumitomo Electric Industries Ltd
Original Assignee
Sumitomo Electric Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sumitomo Electric Industries Ltd filed Critical Sumitomo Electric Industries Ltd
Publication of EP0136708A2 publication Critical patent/EP0136708A2/de
Publication of EP0136708A3 publication Critical patent/EP0136708A3/en
Application granted granted Critical
Publication of EP0136708B1 publication Critical patent/EP0136708B1/de
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C03B37/01—Manufacture of glass fibres or filaments
    • C03B37/012—Manufacture of preforms for drawing fibres or filaments
    • C03B37/014—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD]
    • C03B37/01446—Thermal after-treatment of preforms, e.g. dehydrating, consolidating, sintering
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C03B37/01—Manufacture of glass fibres or filaments
    • C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
    • C03B37/025—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor from reheated softened tubes, rods, fibres or filaments, e.g. drawing fibres from preforms
    • C03B37/027—Fibres composed of different sorts of glass, e.g. glass optical fibres
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C03B37/01—Manufacture of glass fibres or filaments
    • C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
    • C03B37/025—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor from reheated softened tubes, rods, fibres or filaments, e.g. drawing fibres from preforms
    • C03B37/028—Drawing fibre bundles, e.g. for making fibre bundles of multifibres, image fibres
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C03B37/10—Non-chemical treatment
    • C03B37/14—Re-forming fibres or filaments, i.e. changing their shape
    • C03B37/15—Re-forming fibres or filaments, i.e. changing their shape with heat application, e.g. for making optical fibres
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags

Definitions

  • the present invention relates to a process for producing an image fiber. More particularly, it relates to- a process for producing an image fiber or a multi-core ----optical fiber attenuation of which is not significantly increased when it is exposed to radiation, for example, gamma-ray.
  • an image fiber When an image fiber is used under a condition under which it is exposed to radiation, particularly gamma-ray, its attenuation is increased. Such the attenuation increase of the image fiber, however, can be minimized by forming it with optical fibers each comprising a cladding made of fluorine-doped silica glass and a core made of pure silica.
  • the attenuation near the wavelength of 0.63 micrometer is caused by defects in SiO 2 glass,'i.e. bond defects, which may be represented as follows:
  • the image fiber has a further drawbacks that it has more bond defects than the usual silica glass. This may be because anisotropy is created in the longitudinal direction so that the bonds become easily broken during drawing of the image fiber preform (cf. for example, R. Brückner, "Properties and Structure of Uitreous Silica, I", Journal of Non-Crystalline Solids, 5, 1970, 123-175).
  • Such defects are also found in an image fiber preform.
  • the conventional image fiber or image fiber preform has not been treated so as to remove such bond defects.
  • One of the object of the invention is to provide. an image fiber which has greatly improved attenuation which is less increased than that of the conventional image fiber when it is irradiated, for example, with gamma-ray.
  • Another object of the invention is to provide a process for producing an image fiber of the invention.
  • the present invention provides a process for producing an image fiber comprising drawing an image fiber preform consisting of a bundle of a plurality of optical fibers each of which is drawn from an optical fiber preform and consists of a core and a cladding, in which at least one of the optical fiber preform, the optical fiber, the image fiber preform and the image fiber is hydrogenated at a temperature higher than a room temperature.
  • hydrogen is introduced at any stage after the production of the optical fiber preform as described below.
  • the optical fiber preform is hydrogenated and then drawn to form an optical fiber.
  • a plurality of the thus formed optical fibers are bundled and fused together by heating and, then, drawn to fabricate an image fiber.
  • the optical fibers are hydrogenated.
  • a bundle of the hydrogenated optical fibers are processed in the same manner as in the first instance to fabricate an image fiber.
  • the hydrogenation may be carried out on to the image fiber preform, and also on to the image fiber.
  • optical fiber preform two or more, preferably all of the optical fiber preform, the optical fiber, the image fiber preform and the image fiber are hydrogenated.
  • the hydrogenation may be carried out in pure hydrogen gas or in air containing hydrogen at a partial pressure of at least 0.05 atm, preferably at least 0.1 atm.
  • the treating temperature is higher than a room temperature and lower than about 1,600°C which corresponds to the melting point of glass fibers, preferably form 200 to 1,000°C.
  • a silica cladding material doped with 2% by weight of fluorine was deposited around a core material of pure silica by the plasma outside deposition method to form a optical fiber preform (Stage 1).
  • the thus formed optical fiber preform was drawn to form an optical fiber (Stage 2).
  • 5,000 optical fibers were bundled to form an image fiber preform (Stage 3).
  • the image fiber preform was drawn to produce an image fiber composed of 5,000 image elements having a diameter of 1.2 mm (Stage 4).
  • the present invention is not limited to image fibers of the foregoing structure and is effective for image fibers of other Structures.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Glass Compositions (AREA)
  • Manufacture, Treatment Of Glass Fibers (AREA)
  • Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
  • Surface Treatment Of Glass Fibres Or Filaments (AREA)
EP84111827A 1983-10-03 1984-10-03 Verfahren zur Herstellung eines Bündels von optischen Fasern Expired EP0136708B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP183122/83 1983-10-03
JP58183122A JPS6075802A (ja) 1983-10-03 1983-10-03 イメ−ジフアイバの製造方法

Publications (3)

Publication Number Publication Date
EP0136708A2 true EP0136708A2 (de) 1985-04-10
EP0136708A3 EP0136708A3 (en) 1985-09-25
EP0136708B1 EP0136708B1 (de) 1988-01-13

Family

ID=16130171

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84111827A Expired EP0136708B1 (de) 1983-10-03 1984-10-03 Verfahren zur Herstellung eines Bündels von optischen Fasern

Country Status (6)

Country Link
US (1) US4553995A (de)
EP (1) EP0136708B1 (de)
JP (1) JPS6075802A (de)
KR (1) KR890003438B1 (de)
CA (1) CA1221545A (de)
DE (1) DE3468670D1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6220059B1 (en) * 1995-12-21 2001-04-24 Heraeus Quarzglas Gmbh Method of coating a UV-fiber with blocking layers and charging the fiber with hydrogen or deuterium
US6532767B1 (en) * 1998-09-22 2003-03-18 Corning Incorporated Methods for producing fused silica glass

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE116448T1 (de) * 1989-06-09 1995-01-15 Heraeus Quarzglas Optische teile und rohlinge aus synthetischem siliziumdioxidglas und verfahren zu ihrer herstellung.
US5059229A (en) * 1990-09-24 1991-10-22 Corning Incorporated Method for producing optical fiber in a hydrogen atmosphere to prevent attenuation
US5267343A (en) * 1992-09-03 1993-11-30 The United States Of America As Represented By The United States Department Of Energy Enhanced radiation resistant fiber optics
US6115524A (en) * 1997-07-31 2000-09-05 Corning Incorporated Optical waveguide attenuating device and method for producing the same
DE19850736C2 (de) * 1998-11-04 2003-04-17 Heraeus Tenevo Ag Kernglas für eine Vorform für eine optische Faser, unter Verwendung des Kernglases hergestellte Vorform, sowie Verfahren zur Herstellung des Kernglases einer Vorform für eine optische Faser
US6539151B2 (en) 2000-08-21 2003-03-25 Corning, Incorporated Method for making separable multiple core optical fibers, the resulting fiber structures, and uses thereof
JP2017032972A (ja) * 2015-08-04 2017-02-09 株式会社フジクラ マルチコア光ファイバおよびその製造方法
WO2017022546A1 (ja) * 2015-08-04 2017-02-09 株式会社フジクラ マルチコア光ファイバおよびマルチコア光ファイバの製造方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2843333A1 (de) * 1978-10-04 1981-01-15 Siemens Ag Lichtwellenleiter

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2608722A (en) * 1950-09-06 1952-09-02 Otmar M Stuetzer Process for making microspacers
US3355273A (en) * 1962-11-19 1967-11-28 Warner Lambert Pharmaceutical Method for making bubble free fiber optical image-transfer devices
US3690853A (en) * 1970-08-19 1972-09-12 Optics Technology Inc Method of making high resolution image transmitting fiber optics bundles
US3837824A (en) * 1973-05-29 1974-09-24 American Optical Corp Drawing optical fiber under superatmospheric pressure
US4021216A (en) * 1975-10-24 1977-05-03 International Telephone And Telegraph Corporation Method for making strip microchannel electron multiplier array
LU74666A1 (de) * 1976-03-29 1977-10-10
FR2348168A1 (fr) * 1976-04-14 1977-11-10 Cables De Lyon Geoffroy Delore Dispositif de soudage de fibres optiques bout a bout
JPS5890601A (ja) * 1981-11-25 1983-05-30 Furukawa Electric Co Ltd:The イメ−ジフアイバの製造方法

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2843333A1 (de) * 1978-10-04 1981-01-15 Siemens Ag Lichtwellenleiter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6220059B1 (en) * 1995-12-21 2001-04-24 Heraeus Quarzglas Gmbh Method of coating a UV-fiber with blocking layers and charging the fiber with hydrogen or deuterium
US6532767B1 (en) * 1998-09-22 2003-03-18 Corning Incorporated Methods for producing fused silica glass

Also Published As

Publication number Publication date
US4553995A (en) 1985-11-19
JPS6075802A (ja) 1985-04-30
KR890003438B1 (ko) 1989-09-21
EP0136708A3 (en) 1985-09-25
CA1221545A (en) 1987-05-12
DE3468670D1 (en) 1988-02-18
JPH021099B2 (de) 1990-01-10
KR850003260A (ko) 1985-06-13
EP0136708B1 (de) 1988-01-13

Similar Documents

Publication Publication Date Title
SU963459A3 (ru) Способ получени заготовки дл оптического волновода
KR890001121B1 (ko) 싱글모우드 파이버용 중간체의 제조방법
US4441788A (en) Optical wave guide with fluorine-doped core
JP2917729B2 (ja) 光ファイバ母材の製造方法
EP0136708B1 (de) Verfahren zur Herstellung eines Bündels von optischen Fasern
US4242375A (en) Process for producing optical transmission fiber
US4165152A (en) Process for producing optical transmission fiber
JPS5924095B2 (ja) 単一モ−ド光ファイバ−プレフォ−ムの製造方法
JP2542356B2 (ja) 石英系光ファイバガラスの耐放射線処理方法
US20080031581A1 (en) Optical fiber and method of manufacturing an optical fiber
US4880452A (en) Method for producing glass preform for optical fiber containing fluorine in cladding
EP0201937B1 (de) Verfahren zur Herstellung einer Glasvorform für optische Fasern
JP4463605B2 (ja) 光ファイバ母材およびその製造方法
EP0164127A2 (de) Verfahren zur Herstellung einer Glasvorform für optische Fasern
JPH1171125A (ja) 光ファイバ用プリフォームの製造方法
JPS6086047A (ja) 光フアイバ用ガラス母材の製造方法
JPS63129035A (ja) 光フアイバの製造方法
JP4459875B2 (ja) 光ファイバ用母材とその製造方法、光ファイバの製造方法
JPH1059730A (ja) 合成石英ガラスの製造方法
JPH0948630A (ja) 光ファイバ用母材の製造方法
JPS632900B2 (de)
JP2635563B2 (ja) 光伝送体用ガラス素材の製造方法
KR910000731B1 (ko) 불소를 클래드부에 함유하는 광파이버용 모재의 제조방법
GB2056965A (en) Optical fibers
JPH0437623A (ja) 光ファイバ母材の製造方法

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): DE FR GB SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Designated state(s): DE FR GB SE

17P Request for examination filed

Effective date: 19860225

17Q First examination report despatched

Effective date: 19861222

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB SE

REF Corresponds to:

Ref document number: 3468670

Country of ref document: DE

Date of ref document: 19880218

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
EAL Se: european patent in force in sweden

Ref document number: 84111827.6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19970924

Year of fee payment: 14

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19971009

Year of fee payment: 14

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19971010

Year of fee payment: 14

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19971015

Year of fee payment: 14

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19981003

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19981004

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19981003

EUG Se: european patent has lapsed

Ref document number: 84111827.6

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990630

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990803